Influence of building structure on aerodynamic performance of downstream vertical axis wind turbine
It is necessary to study the locations of wind turbine in the downstream of buildings to effectively utilize the urban wind energy and improve their operation efficiency.In this paper,the influence of building structure on wind speed and aerodynamic performance of wind turbine downstream was analyzed by computational fluid dynamics method.Results show that the blocking,acceleration,and deflection of free inlet flow by buildings can effectively improve the wind speed somewhere downstream and improve the aerodynamic performance of wind turbine.The circular structure has little influence on the downstream flow field,and the average wind speed at each location is close to the free flow.In contrast,the wind speed in the downstream of triangular and quadrilateral buildings fluctuates violently,and their average wind speed is higher.The torque of wind turbine improves greatly compared with that in the downstream of circular building.For the same outer profile of buildings,the large wind-receiving area of vertical rectangle building can increase the leeward low-pressure area,which effectively improves the wind speed of downstream flow field and has better wind-gathering effect than the horizontal rectangular building.
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